Family name Koltun (Koltun 
, Колтун 
, Kołtun 
) , all around the world, is quite a rare last name. The cognomen Koltun is habitual in Eastern Europe, particularly Belarus, where it is quite a rare surname, Poland, and Ukraine. Not in comparison with a country's population, it is commonest in Eastern Europe, particularly Poland, Ukraine, and Russia. Likewise, Koltun is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Koltun | Germany, Poland, Brazil, United States, Argentina |
| Колтун | Kazakhstan, Ukraine, Russia, Belarus |
| Kołtun | United Kingdom, Poland |
| daniel s. koltun physicist, US (b. 1933) |
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| julian koltun (b. 1950) |
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| ken koltun-fromm (b. 1966) |
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| arkady koltun researcher |
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| vladlen koltun researcher (b. 1980) |
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| arnold martin koltun Ph.D. Polytechnic University 1975 |
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| chaja koltun Holocaust victim, PL |
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| kristen j koltun researcher |
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| alessandra koltun researcher |
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| marek koltun college basketball player (2007–2010) Lafayette |
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| vladimir mikhailovich koltun |
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| harold koltun |
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| gregory f. koltun |
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| norman koltun |
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| sarah koltun Canadian curler, CA (b. 1993) |
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